My baby 4 month 17 days he can roll over but we should turn him on one side , after then he rolling , but not rolling by himself , is tat normal

A. Yes yes you may not be aware about the fact as a child may learn to roll over in between the age of three months to 9 months so just encourage your child and it’s a good time for you to keep your child on a mattress on a floor because once kids reach the milestone of them falling down to avoid that situation you should make your child stay on floor